springboot项目部署到k8s讲解.md · cd封风疯/k8s

##                                                                      springboot项目部署到k8s

### 1.部署基础的k8s环境

~~~shell
#事先准备的k8s相关tar包
docker load -i k8s.1.17.5.tar
docker load -i calico.3.14.2.tar

#初始化k8s
kubeadm init --apiserver-advertise-address=192.168.174.148 --kubernetes-version v1.17.5 --service-cidr=10.1.0.0/16 --pod-network-cidr=10.81.0.0/16

#按照提示配置
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

#将其他节点加入集群
kubeadm join 192.168.174.148:6443 --token vqh471.lll2ag8o5s4z08ba \
    --discovery-token-ca-cert-hash sha256:121283c6938847538492c3c6594f41940004a92c8619971184df952ea2323cb7
 
 #命令补全
echo "source <(kubectl completion bash)" >> ~/.bash_profile
source ~/.bash_profile

#配置k8s网络,下载calico.yaml
kubectl apply -f calico.yaml

#查看节点
[root@k8s-master k8s-servcie]# kubectl get nodes
NAME         STATUS   ROLES    AGE     VERSION
k8s-master   Ready    master   4h44m   v1.17.5
k8s-node1    Ready    <none>   4h43m   v1.17.5
k8s-node2    Ready    <none>   4h43m   v1.17.5
~~~

2.在k8s中搭建mysql环境，并将数据挂载到宿主机

~~~shell
docker pull  mysql:5.7.31
~~~

编写mysql的资源文件mysqlsvc.yml

~~~yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql-deploy
  labels:
    app: mysql-deploy
spec:
  replicas: 1
  template:
    metadata:
      name: mysql-deploy
      labels:
        app: mysql-deploy
    spec:
      #添加标签指定节点
      nodeSelector:
        mysql: mysql
      containers:
        - name: mysql-deploy
          image: mysql:5.7.31
          imagePullPolicy: IfNotPresent
          ports:
            - containerPort: 3306
          env:
            - name: MYSQL_ROOT_PASSWORD
              value: "123456"
            - name: TZ
              value: Asia/Shanghai
          args:
            - "--character-set-server=utf8mb4"
            - "--collation-server=utf8mb4_unicode_ci"
          volumeMounts:
            - mountPath: /var/lib/mysql   #容器内的目录
              name: mysqldata
      restartPolicy: Always
      volumes:
        - name: mysqldata
          hostPath:
            path: /data/mysql   #挂载在宿主机的目录
            type: Directory
  selector:
    matchLabels:
      app: mysql-deploy
---
apiVersion: v1
kind: Service
metadata:
  name: mysql-svc
spec:
  selector:
    app: mysql-deploy
  ports:
    - port: 3306
      targetPort: 3306
      nodePort: 30036
  type: NodePort
~~~

指定node节点

~~~shell
kubectl label nodes k8s-node01 mysql=mysql

#查看node节点label值
kubectl get nodes --show-labels
~~~

加载使用mysqlsvc.yml

~~~shell
kubectl apply -f mysqlsvc.yml

[root@k8s-master k8s-servcie]# kubectl get service
NAME          TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)          AGE
kubernetes    ClusterIP   10.1.0.1       <none>        443/TCP          3h52m
mysql-svc     NodePort    10.1.58.200    <none>        3306:30036/TCP   56m
~~~

使用navicat连接

![](img/微信截图_20210505210427.jpg)

### 2.编写springboot项目

实体类Student

~~~java
@Data
@TableName(value = "t_student")
@Accessors(chain = true)
public class Student {

@Id
    private String id;

private String name;

private String address;

}
~~~

controller

~~~java
@RestController
public class StudentController {

@Autowired
    StudentDao studentDao;

@GetMapping("/getAll")
    public List<Student> getAll() {
        return studentDao.selectList(null);
    }
}
~~~

application.properities

~~~properties
# 配置数据库连接池及数据库驱动
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
# 配置mysql的链接信息
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.url=jdbc:mysql://192.168.174.152:30036/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai&allowMultiQueries=true

mybatis.mapper-locations="classpath*:mapper/*.xml"

logging.level.com.lagou.demo.dao=debug
~~~

测试无误后，打包上传到服务器

编写Dockfile，制作微服务镜像

~~~dockerfile
FROM openjdk:8-alpine3.9
# 作者信息
MAINTAINER laosiji Docker springboot "chendong"
# 修改源
RUN echo "http://mirrors.aliyun.com/alpine/latest-stable/main/" > /etc/apk/repositories

# 安装需要的软件，解决时区问题
RUN apk --update add curl bash tzdata && \
    rm -rf /var/cache/apk/*

#修改镜像为东八区时间
ENV TZ Asia/Shanghai
ARG JAR_FILE
COPY ${JAR_FILE} app.jar
EXPOSE 8080
ENTRYPOINT ["java","-jar","/app.jar"]
~~~

将dockerfile文件上传到与jar包一个目录中

~~~shell
docker build --rm -t  k8s-springboot-project:v1 --build-arg JAR_FILE=dockerdemo.jar .

#生成镜像
[root@k8s-node1 download]# docker images
REPOSITORY                           TAG                  IMAGE ID       CREATED             SIZE
k8s-springboot-project               v1                   b98a032e5bb4   About an hour ago   154MB
~~~

编写微服务的k8s资源文件 projectsvc.yml

~~~yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: project-deploy
  labels:
    app: project-deploy
spec:
  replicas: 1
  template:
    metadata:
      name: project-deploy
      labels:
        app: project-deploy
    spec:
      containers:
        - name: project-deploy
          image: k8s-springboot-project:v1
          imagePullPolicy: IfNotPresent
      restartPolicy: Always
  selector:
    matchLabels:
      app: project-deploy
---
apiVersion: v1
kind: Service
metadata:
  name: project-svc
spec:
  selector:
    app: project-deploy
  ports:
    - port: 8080
      targetPort: 8080
      nodePort: 30080
  type: NodePort
~~~

运行

~~~shell
kubectl apply -f projectsvc.yml

根据暴露的端口号进行访问 192.168.174.148:30080/getAll 或 192.168.174.152:30080/getAll

![](img/微信截图_20210505211503.png)

![](img/微信截图_20210505211518.png)

查看数据库目录是否挂载成功

~~~shell
[root@k8s-node1 data]# ls
mysql
[root@k8s-node1 data]# cd mysql/
[root@k8s-node1 mysql]# ls
auto.cnf    ca.pem           client-key.pem  ibdata1      ib_logfile1  mysql               private_key.pem  server-cert.pem  sys
ca-key.pem  client-cert.pem  ib_buffer_pool  ib_logfile0  ibtmp1       performance_schema  public_key.pem   server-key.pem   test
[root@k8s-node1 mysql]# cd test/
[root@k8s-node1 test]# ls
db.opt  t_student.frm  t_student.ibd
~~~

cd封风疯/k8s

简介

发行版

贡献者

近期动态

cd封风疯/k8s .gitee-modal { width: 500px !important; }

简介

发行版

贡献者

近期动态

搜索帮助

cd封风疯/k8s